I actually had about 75% of the sand and most of the wood and 8 gallons of the water in an 8 gallon tank for about 2 months before.

I moved everything over to the 13 gallon 3 weeks ago. Should I have cycled the tank again? The fish and snails do not seem to be bothered by the water quality.

The water was crystal clear last week before I left for the weekend. When I got back, there was algae on the glass (too much lighting). I toned down the lighting to half of what it was, reduced my light period, scrubbed the algae off the glass and did a 30% water change. That was all on Sunday. I then did another 30% water change yesterday (Wednesday) and then woke up this morning and it was cloudy like there was a fog being blown around in my tank.